CVE-2025-55166
Published: 12 August 2025
Summary
CVE-2025-55166 is a medium-severity Cross-site Scripting (CWE-79) vulnerability. Its CVSS base score is 5.1 (Medium).
Operationally, ranked in the top 47.3% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-24263
Vulnerability details
savg-sanitizer is a PHP SVG/XML sanitizer. Prior to version 0.22.0, the sanitization logic in the cleanXlinkHrefs method only searches for lower-case attribute name, which allows to by-pass the isHrefSafeValue check. As a result this allows cross-site scripting or linking to…
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external domains. This issue has been patched in version 0.22.0.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Validates web inputs to reject script-related content that could produce XSS.
Security awareness includes verifying URLs and avoiding untrusted redirects that lead to malicious sites.
Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.
Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.